Sam4s ER-5100 II SERIES, Service Manual, Page: 27 / 89

SAM4S ER-5100II SERIES 6-1
6 Troubleshooting
6-1 Troubleshooting
End
Power
Problem
Power Out
Ok? On Trans
Y
N
1. Check the Power Cable
2. Check the Power S/W PCB.
3. Check the Power Transformer.
Power VDISP
(+30V) Ok?
Y
1. Check the Bridge Diode(BD2) on Main PBA
2. Check the VDISP signal whether it is short.
N
Power +24V
Ok?
Power VCC
(+5V) Ok?
Y
1. Check the Fuse (FU1) on Main PBA
2. Check the Bridge Diode(BD1) on Main PBA
3. Check the Z-DIODE (ZD4)
4. Check the TR TIP142,2222A (Q19,Q20)
5. Check the +24V whether it is short or open.
1. Check the KA34063(U27)
2. Check the TR KSA1010(Q22)
3. Check the VCC whether it is short or open.
N
Y
N